| Microstructure and texture optimization by static recrystallization originating from {10-12} extension twins in a Mg-Gd-Y alloy | |
| Lu, S. H.1,2; Wu, D.1; Chen, R. S.1; Han, En-hou1 | |
| Corresponding Author | Wu, D.(dwu@imr.ac.cn) ; Chen, R. S.(rschen@imr.ac.cn) |
| 2020-12-15 | |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| ISSN | 1005-0302 |
| Volume | 59Pages:44-60 |
| Abstract | During the deformation of Mg alloys, {10-12} extension twin often contributes to the formation of basal texture but rarely assists the nucleation of recrystallization, i.e., effective grain refinement, therefore it seems to make against the improvement of formability and mechanical properties. In this work, {10-12} extension twin has been creatively utilized as a preference nucleation site for static recrystallization (SRX), achieving grain refinement and orientation randomization in a Mg-Gd-Y alloy using multi-directional impact forging (MDIF) and subsequent annealing treatment. Effect of {10-12} extension twin on SRX behavior has been investigated by annealing treatment at 450 degrees C using quasi-in-situ optical microscopy (OM) and quasi-in-situ electron back-scattering diffraction (EBSD). The microstructural evolution during annealing shows that several SRX gains can nucleate from the grain boundary of untwinned grains, but they only have few influences on the final microstructure due to their limited volume faction and sluggish growth. In contrast, a large number of SRX gains can initiate from {10-12} extension twin and grow up without the confine of twin boundaries. Finally, they consume their parent grains and make the main contribution to grain refinement. This should be attributed to those pinned {10-12} twin boundary, by interacting with various dislocation slips during the MDIF process, which can operate like grain boundary, store enough strain energy, and promote the nucleation of SRX during annealing. On the other hand, SRX grains usually keep initial random orientation and further randomize the forging texture during annealing treatment. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| Keyword | Mg-Gd-Y alloy Multi-directional impact forging (MDIF) {10-12} extension twin Quasi-in-situ electron back-scattering diffraction (EBSD) Static recrystallization (SRX) |
| Funding Organization | National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Science and Technology Major Project of China ; Natural Science Foundation of Liaoning province |
| DOI | 10.1016/j.jmst.2020.04.040 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2016YFB0301104] ; National Natural Science Foundation of China[51531002] ; National Natural Science Foundation of China[51301173] ; National Natural Science Foundation of China[51601193] ; National Natural Science Foundation of China[51701218] ; National Science and Technology Major Project of China[2017ZX04014001] ; Natural Science Foundation of Liaoning province[20180550799] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000588638600005 |
| Publisher | JOURNAL MATER SCI TECHNOL |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/141263 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Wu, D.; Chen, R. S. |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Lu, S. H.,Wu, D.,Chen, R. S.,et al. Microstructure and texture optimization by static recrystallization originating from {10-12} extension twins in a Mg-Gd-Y alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,59:44-60. |
| APA | Lu, S. H.,Wu, D.,Chen, R. S.,&Han, En-hou.(2020).Microstructure and texture optimization by static recrystallization originating from {10-12} extension twins in a Mg-Gd-Y alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,59,44-60. |
| MLA | Lu, S. H.,et al."Microstructure and texture optimization by static recrystallization originating from {10-12} extension twins in a Mg-Gd-Y alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 59(2020):44-60. |
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